MKS Instruments, Inc. provides instruments, systems, subsystems and process control solutions to measure, control, power, monitor, and analyze parameters of manufacturing processes to improve process performance and productivity for its customers. It operates through the following segments: VSD(Vacuum Solutions Division), PSD (Photonics Solutions Division), and MSD (Materials Solutions Division). The VSD segment delivers foundational technology solutions to semiconductor manufacturing, electronics and packaging and specialty industrial applications. The PSD Segment provides a range of instruments, components and subsystems to edge semiconductor manufacturing, electronics and packaging and specialty industrial applications. The MSD segment develops process and manufacturing technologies for advanced surface modification, electroless and electrolytic plating, and surface finishing. The company was founded in 1961 and is headquartered in Andover, MA.